Réponse:
a
[tex]a) {10}^{2} \times 10 = 1000ou {10}^{3} \\ {10}^{2} \div 10 = 10 \\ 0.1 \times 1000 = 100 \\ 0.1 \div 1000 = 1 . {10}^{4} \\ 0.001 \times 100 = 0.1 \\ {10}^{5} \times {10}^{2} = {10}^{7} \\ {10}^{5} \div {10}^{2} = {10}^{3} [/tex]
[tex]c)0.0005 \times ( - 0.20) = - 1 . {10}^{ - 4} \\ 0.0005 \div - 0.20 = 2.5. {10}^{ - 3} \\ 100000 \times 0.001 = {10}^{2} \\ 100000 \div 0.001 = {10}^{8} [/tex]
[tex]b) \frac{0.04}{0.2} = \frac{1}{5} = 0.2 \\ \frac{37}{70} = x \\ \frac{6}{8} = \frac{2 \times 3}{2 \times 4} = \frac{3}{4} = 0.75[/tex]
